Added device_id to solver.prototxt and to solver.cpp
Added device_query.cpp to examples/ to get basic information about the current GPU device or other device_id
Update devicequery.cpp

Changed Copyright
Update caffe.proto
Update solver.cpp

Added these two conditions before trying SetDevice
param_.solver_mode() && param_.has_device_id()
Merge pull request #69 from sguada/solver_device_id

set device in solver config